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Elucidation of the mechanism of tumorigenesis by the interaction between hepatic stellate cells and hepatocytes in the cancer microenvironment.

Research Project

Project/Area Number 20K16163
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 49010:Pathological biochemistry-related
Research InstitutionJapanese Foundation for Cancer Research

Principal Investigator

LOO Tze mun  公益財団法人がん研究会, がん研究所 細胞老化プロジェクト, 研究員 (40816998)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords脂肪肝 / 代謝 / 細胞老化 / 肥満
Outline of Research at the Start

近年、過剰な栄養摂取によって引き起こされる、非アルコール性脂肪性肝炎(NASH)を伴った肝がんの発症が増加傾向にある。申請者はこれまでにNASHを介した肝がん発症に、細胞老化を起こした肝星細胞が関わっていることを明らかにしたが、まだ不明な点がある。本研究のにおいて、申請者は老化した肝星細胞と肝実質細胞の相互作用による着目し、代謝異常による肝がんの発症機構を解明することを目的とする。そのため、申請者は老化した肝星細胞と肝実質細胞の代謝状態を解析し、代謝異常を引き起こす原因因子を同定して、最終的には新たな肝がんの予防法や治療法の開発に繋げることを目標とする。

Outline of Final Research Achievements

Our previous studies have found that senescent hepatic stellate cells are involved in the development of obesity-induced liver cancer. However, the involvement of interaction between senescent hepatic stellate cells and hepatocytes remains unclear. We cultured hepatocytes and hepatic stellate cells in the environment that mimics a fatty liver and found that the expression of genes involved in lipid metabolism largely changed. Moreover, we successfully isolated hepatic stellate cells and hepatocytes from mouse fatty livers to investigate this cell-cell interaction. Furthermore, inhibiting lipid accumulation in the hepatocytes of obese mice suppressed the formation of liver tumors. These results suggest that aged hepatic stellate cells regulate the metabolism of hepatic parenchymal cells and promote the formation of liver tumors.

Academic Significance and Societal Importance of the Research Achievements

今回の研究から、申請者は肥満誘導性肝がんモデルマウスの腫瘍部における肝実質細胞と肝星細胞が異なる脂質代謝の状態を呈していることを見出し、それらが肝腫瘍の脂質の蓄積を引き起こし、肝がんの発症を促すという知見を得ることができた。このことはがん微小環境内における細胞間の相互作用によるがんの発症の基本メカニズムの解明に繋がる成果である。また、本研究により申請者はマウスの脂肪肝から肝星細胞と肝実質細胞を単離する系を構築しており、より生体に近い状態で詳細な細胞の解析が可能になったことから、今後肥満誘導性肝がんに対して有効な治療法や予防法の開発につながる可能性が期待される。

Report

(3 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (5 results)

All 2021 2020

All Journal Article (4 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (1 results)

  • [Journal Article] Pericentromeric noncoding RNA changes DNA binding of CTCF and inflammatory gene expression in senescence and cancer2021

    • Author(s)
      Kenichi Miyata, Yoshinori Imai, Satoshi Hori, Mika Nishio, Tze Mun Loo, Ryo Okada, Liying Yang, Tomoyoshi Nakadai, et. al.
    • Journal Title

      Proc Natl Acad Sci U S A

      Volume: 118 Issue: 35

    • DOI

      10.1073/pnas.2025647118

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] SASP因子の機能解析2020

    • Author(s)
      羅 智文、菅原 祥、高橋暁子
    • Journal Title

      老年内科

      Volume: 2 Pages: 610-618

    • Related Report
      2020 Research-status Report
  • [Journal Article] DNA Damage Regulates Senescence-Associated Extracellular Vesicle Release via the Ceramide Pathway to Prevent Excessive Inflammatory Responses2020

    • Author(s)
      Hitomi Kazuhiro、Okada Ryo、Loo Tze Mun、Miyata Kenichi、Nakamura Asako J.、Takahashi Akiko
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 21 Issue: 10 Pages: 3720-3720

    • DOI

      10.3390/ijms21103720

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A BET family protein degrader provokes senolysis by targeting NHEJ and autophagy in senescent cells.2020

    • Author(s)
      Wakita M, Takahashi A, Sano O, Loo TM, Imai Y, Narukawa M, Iwata H, Matsudaira T, Kawamoto S, Ohtani N, Yoshimori T, Hara E.
    • Journal Title

      Nat Commun

      Volume: 1935 Issue: 1 Pages: 1935-1935

    • DOI

      10.1038/s41467-020-15719-6

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] The Analysis of Epigenetic alteration in cellular senescence and cancer : 細胞老化とがんにおけるエピゲノム異常の解析2020

    • Author(s)
      高橋 暁子、宮田 憲一、羅 智文、菅原 祥
    • Organizer
      第79回日本癌学会学術総会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2023-01-30  

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